High pressure proton exchange membrane based water electrolyzer system

Patent metadata

Field	Value
Publication number	US-9255333-B2
Application number	US-25182208-A
Country	US
Kind code	B2
Filing date	Oct 15, 2008
Priority date	Oct 15, 2008
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A high pressure proton exchange membrane based water electrolyzer system that may include a series of proton exchange membrane (PEM) cells that may be electrically coupled together and coupled to a proton exchange membrane to form a membrane electrode assembly (MEA) that is spiral wound onto a conductive center post, wherein an innermost PEM cell of the MEA may be electrically connected with the conductive center post, or center electrode, and wherein an outermost PEM cell of the MEA may be electrically coupled to pressure vessel cylinder, or outer electrode. Each PEM cell may include an anode portion and a cathode portion separated by a portion of the PEM membrane. In addition, a non-permeable separator layer may also be spiral wound around the conductive center post and separates the wound portions of the PEM core.

First claim

What is claimed is:

1. A product comprising a high pressure proton exchange membrane based water electrolyzer system comprising:
an outer electrode having an interior region and a water inlet;
a gas outlet coupled within another portion of said outer electrode;
a center electrode coupled within said interior region, said center electrode electrically coupled to said outer electrode through a direct current power source;
a membrane electrode assembly spiral wound around said center electrode within said interior region, said membrane electrode assembly including a plurality of proton exchange membrane cells electrically coupled in series, each of said plurality of proton exchange membrane cells coupled to a proton exchange membrane, wherein an innermost one of said plurality of proton exchange membrane cells may be electrically coupled to said center electrode and wherein an outermost one of said plurality of proton exchange membrane cells may be electrically coupled to said outer electrode; and
a non-conductor separator member wound around said center electrode and coupled to said center electrode and said outer electrode, said non-conductor separator membrane preventing electrical contact between said plurality of proton exchange membrane cells.

2. The product of claim 1 , wherein said center electrode comprises a cathode electrode and wherein said outer electrode comprises an anode electrode.

3. The product of claim 1 , wherein said center electrode comprises an anode electrode and wherein said outer electrode comprises a cathode electrode.

4. The product of claim 1 , wherein each of said plurality of proton exchange membrane cells comprises a cathode electrode and an anode electrode, and each of the cathode and the anode comprises at least one catalyst layer including a proton conducting ionomer intermingled with catalyst particles.

5. The product of claim 1 , wherein said interior portion is separated into a first interior portion and a second interior portion by a wire screen, wherein said membrane electrode assembly is entirely contained within said first interior portion; and
wherein said second interior portion may include a plurality of non-conductive spheres.

6. The product of claim 5 , wherein said gas outlet comprises an oxygen gas outlet and a hydrogen gas outlet and wherein the hydrogen gas outlet is at higher elevation than the oxygen outlet to allow separation of oxygen and hydrogen gases through gravity stratification.

7. The product of claim 1 further comprising:
a check valve coupled to said water inlet for controlling the flow of water into said interior portion, said check valve movable from a closed position to an open position; and
a water level sensor for measuring water levels within said interior portion, wherein said water level sensor is coupled to said check valve and controls the positioning of said check valve between said open position and said closed position.

8. The product of claim 1 , wherein said proton exchange membrane comprises a sulfonic perfluorocarbon proton conductive membrane.

9. The product of claim 1 further comprising a fuel cell coupled to said high pressure proton exchange membrane based water electrolyzer system.

10. The product of claim 1 further comprising an electric vehicle comprising said high pressure proton exchange membrane based water electrolyzer system.

11. The product of claim 1 further comprising an electric vehicle comprising a fuel cell coupled to said high pressure proton exchange membrane based water electrolyzer system of claim 1 .

12. A method for generating hydrogen gas and oxygen gas from water, the method comprising:
(a) forming a high pressure proton exchange membrane based water electrolyzer system comprising:
an outer electrode having an interior region;
a water inlet coupled within a portion of said outer electrode;
a gas outlet coupled within another portion of said outer electrode;
a center electrode coupled within said interior region, said center electrode electrically coupled to said outer electrode through a direct current power source;
a membrane electrode assembly spiral wound around said center electrode within said interior region, said membrane electrode assembly including a plurality of proton exchange membrane cells electrically coupled in series, each of said plurality of proton exchange membrane cells coupled to a proton exchange membrane, wherein an innermost one of said plurality of proton exchange membrane cells may be electrically coupled to said center electrode and wherein an outermost one of said plurality of proton exchange membrane cells may be electrically coupled to said outer electrode; and
a non-conductor separator member wound around said center electrode and coupled to said center electrode and said outer electrode, said non-conductor separator membrane preventing electrical contact between said plurality of proton exchange membrane cells on;
(b) introducing a first amount of water within said interior region from said water inlet;
(c) activating said direct current power source to provide a voltage across said center electrode and said outer electrode, said voltage being sufficient to cause said first amount of water to react to produce a first amount of oxygen gas and a first amount of hydrogen gas; and
(d) removing said first amount of oxygen gas and said first amount of hydrogen gas through said gas outlet.

13. The method of claim 12 , wherein said center electrode comprises a cathode electrode and wherein said outer electrode comprises an anode electrode.

14. The method of claim 12 , wherein said center electrode comprises an anode electrode and wherein said outer electrode comprises a cathode electrode.

15. The method of claim 12 further comprising:
separating said interior region into a first region and a second region using a wire screen, wherein said membrane electrode assembly is located within said first region; and
introducing a plurality of non-conductive spheres within said second region to aid in separating said first amount of oxygen gas from said first amount of hydrogen gas.

16. The method of claim 15 , wherein (d) removing said first amount of oxygen gas and said first amount of hydrogen gas through said gas outlet comprises:
(d) removing said first amount of oxygen gas through an oxygen gas outlet; and
(e) removing said first amount of hydrogen gas through a hydrogen gas outlet.

17. The method of claim 16 further comprising:
coupling a hydrogen/oxygen interface sensor within a portion of said second region between said hydrogen outlet and said oxygen outlet;
determining a hydrogen gas and oxygen gas interface within said second region; and
removing a portion of said first amount of oxygen gas through said oxygen outlet, or removing a portion of said first amount of hydrogen gas through said hydrogen, to maintain said hydrogen gas and oxygen gas interface approximately centered as said hydrogen/oxygen interface sensor.

18. The method of claim 13 , further comprising:
determining an amount of water contained within said interior region;
introducing a further amount of water within said interior region when said determined amount of water falls below a predetermined threshold level.

19. An electric vehicle comprising:
a high pressure proton exchange membrane based water electrolyzer system comprising:
an outer electrode having an interior region;
a water inlet coupled within a portion of said outer electrode;
a gas outlet coupled within another portion of said outer el

Assignees

• Ouwerkerk David B
• Kelly Nelson A
• Gibson Thomas L
• Gm Global Tech Operations Inc

Inventors

• Ouwerkerk David B
• Kelly Nelson A
• Gibson Thomas L

Classifications

• B60L11/1879

  Operations & Transport · mapped topic

• Y02T10/7005

  Cross-Sectional Technologies · mapped topic

• Y02T10/705

  Cross-Sectional Technologies · mapped topic

• Y02E60/366

  Cross-Sectional Technologies · mapped topic

• C25B1/12 Primary

  Chemistry & Metallurgy · mapped topic